Headband



FIG. 1 is a right side elevational view of a headband showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a rear isometric view thereof in an opened position. 

The ornamental design for a headband, as shown and described. 